/*
 * ProGuard -- shrinking, optimization, obfuscation, and preverification of Java bytecode.
 *
 * Copyright (c) 2002-2018 GuardSquare NV
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program; if not, write to the Free
 * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package proguard.classfile.editor;

import a.annotation.proguard.classfile.attribute.annotation.*;

/**
 * This class can add annotations to a given annotations attribute. Annotations to be added must have been filled out
 * beforehand.
 *
 * @author Eric Lafortune
 */
public class AnnotationsAttributeEditor {
    private AnnotationsAttribute targetAnnotationsAttribute;

    /**
     * Creates a new AnnotationsAttributeEditor that will edit annotations in the given annotations attribute.
     */
    public AnnotationsAttributeEditor(AnnotationsAttribute targetAnnotationsAttribute) {
        this.targetAnnotationsAttribute = targetAnnotationsAttribute;
    }

    /**
     * Adds a given annotation to the annotations attribute.
     */
    public void addAnnotation(Annotation annotation) {
        int annotationsCount = targetAnnotationsAttribute.u2annotationsCount;
        Annotation[] annotations = targetAnnotationsAttribute.annotations;

        // Make sure there is enough space for the new annotation.
        if (annotations.length <= annotationsCount) {
            targetAnnotationsAttribute.annotations = new Annotation[annotationsCount + 1];
            System.arraycopy(annotations, 0, targetAnnotationsAttribute.annotations, 0, annotationsCount);
            annotations = targetAnnotationsAttribute.annotations;
        }

        // Add the annotation.
        annotations[targetAnnotationsAttribute.u2annotationsCount++] = annotation;
    }
}